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maaf kalau salah
(2x-3)(2x+4) = 4x2 + 8x - 6x - 12 = 4x2 + 2x - 12
no 2 BENAR
(2x+5)(2x-5) = 4x2 - 10x + 10x - 25 = 4x2 - 25
no 3 SALAH
(x+2)(x-2) = x2 - 4
no 4 BENAR
x (x-4) = x2 - 4x
jawabannya F